If you don't want to activate the stretch-backports sources in sources.list you can download these packages and install them.
That should work however virtualbox-guest-dkms and virtualbox-dkms will fail to build against that kernel I suppose.

(5th January 2018, 17:02)leszek Wrote: If you don't want to activate the stretch-backports sources in sources.list you can download these packages and install them.
That should work however virtualbox-guest-dkms and virtualbox-dkms will fail to build against that kernel I suppose.

Quote:Q: What is the best recommended way to trigger the required btattach
command during boot to have Bluetooth enabled automatically?

P.S. The idea would be to contribute such a modification to Linux distributions starting to package the btattach command (like Debian), since right now many recent devices simply don't have Bluetooth working out-of-the-box...